<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
      <!-- 1. 引入react核心库 -->
      <script src="../node_modules/react/umd/react.development.js"></script>
      <!-- 2. 引入react-dom 用于支持react操作dom -->
      <script src="../node_modules/react-dom/umd/react-dom.development.js"></script>
      <!-- 引入jsx -->
      <script src="../node_modules/@babel/standalone/babel.min.js"></script>
</head>
<body>
  <div id="root"></div>
</body>

  <script type="text/babel">

      // 3. 创建React元素/创建虚拟dom-使用JSX语法
        let item = <div className='item'>
                      <h2 className='title'>标题</h2>
                      <ul className='list'>
                        <li>1.张三</li>
                        <li>2.李四</li>
                        <li>3.王五</li>
                      </ul>
                   </div>
       // 4. 创建根节点
       let root = ReactDOM.createRoot(document.getElementById('root'))
       // 5. 把虚拟dom渲染到页面中
      root.render(item)

  </script>

</html>